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Hereditory spherocytosis, an autosomal dominant disorder, results in sphere-shaped red blood cells that break down prematurely. If both parents have hereditory spherocytosis, what is the probability that they will have a child that is unaffected by this disorder? O 0 O 1/4 O 1/2 S 3/4 O 10r 100% s Previous Next Quiz saved at 8:17pm Submit Quiz
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Answer #1

Correct option- B. 1/4

Let the dominant allele for spherocytosis S Recessive allele for spherocytosis s Genotype of affected parents Ss Gametes produced by them - S, s Ss x Ss Since the inheritance is autosomal DOMINANT presence of a single dominant allele leads to the disease condition. So, the progeny with both s$ and Ss genotypes are affected. # homozygous recessive ss-unaffected No. of ss progeny Total number of progeny Probability of healthy progeny (ss)-

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